• The Optum Ring System (ORS) is a removable ring that can be mounted in eight different orientations within the 29mm Optum scope body.
• Features an adjustable fiber cover to control ambient lighting.
• Available with a .010”, .015”, .019”, .029”, and .039” pin option as well as a no pin option (all pins are removable).
• Threaded on the target side to accept a lens housing or sunshade. 
• Integrated 8-32 light port allows the use of an electronic light kit to illuminate the fiber and pin.
• Fiber bypass slots let the user wrap fiber around the ring system to collect additional natural light. 
• Made in the USA